EP3559201B1 - Testkarte mit vertiefungsregal - Google Patents

Testkarte mit vertiefungsregal Download PDF

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Publication number
EP3559201B1
EP3559201B1 EP17882854.7A EP17882854A EP3559201B1 EP 3559201 B1 EP3559201 B1 EP 3559201B1 EP 17882854 A EP17882854 A EP 17882854A EP 3559201 B1 EP3559201 B1 EP 3559201B1
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EP
European Patent Office
Prior art keywords
shelf
test card
well
wells
opening
Prior art date
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Active
Application number
EP17882854.7A
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English (en)
French (fr)
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EP3559201A4 (de
EP3559201A1 (de
Inventor
Noah MONROE
Raymond O'bear
Brian Livingston
Patrick Alan YERBIC
Ross MULDER
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Biomerieux Inc
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Biomerieux Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502707—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the manufacture of the container or its components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502723—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by venting arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/06—Fluid handling related problems
    • B01L2200/0684—Venting, avoiding backpressure, avoid gas bubbles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/02—Identification, exchange or storage of information
    • B01L2300/021—Identification, e.g. bar codes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0809—Geometry, shape and general structure rectangular shaped
    • B01L2300/0816—Cards, e.g. flat sample carriers usually with flow in two horizontal directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0809—Geometry, shape and general structure rectangular shaped
    • B01L2300/0829—Multi-well plates; Microtitration plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0848—Specific forms of parts of containers
    • B01L2300/0851—Bottom walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0848—Specific forms of parts of containers
    • B01L2300/0858—Side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
    • B01L2300/0867—Multiple inlets and one sample wells, e.g. mixing, dilution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
    • B01L2300/0874—Three dimensional network
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
    • B01L2300/0883—Serpentine channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0887—Laminated structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
    • B01L2400/0457—Moving fluids with specific forces or mechanical means specific forces passive flow or gravitation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • B01L2400/049—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs

Definitions

  • test cards are used to quickly and accurately study biological samples. Typically, test cards are used in conjunction with spectroscopic or other automated analysis machines.
  • An example of a test card system is the Vitek ® microbial identification and antimicrobial susceptibility testing cards and corresponding Vitek ® machines.
  • the test card contains the reagents and receives the patient samples in a series of small wells, formed in the card in rows and columns and sealed, typically with tape or other sealing membranes on both sides.
  • the test cards are filled with patient sample material through fine hydraulic channels formed in the card.
  • the inventor has discovered several areas for improvement in existing test cards and their corresponding manufacturing techniques. Specifically, at least 5 to 20% of wells were discovered by the inventor to include air bubbles during filling, which bubbles increase the error rate of the testing machine and cause the test card systems to produce inaccurate results. These bubbles were discovered to have been caused by, inter alia , the hydrophobic nature of the chemical components along with the size and internal configuration of the well, with the bubbles being formed by a combination of physical and chemical attributes. In some instances, the inventor discovered that existing molding techniques may cause bubble formation. For example, particular orientations of parting lines from the mold sections may result in a well that traps air under the overhang created by the parting lines.
  • Applicant has identified a number of additional areas for improvement associated with conventional test cards and other associated systems. Through applied effort, ingenuity, and innovation, many of these identified problems have been solved by developing solutions that are included in embodiments of the present invention, many examples of which are described in detail herein.
  • US 2007/0202538 A1 describes assay modules (e.g., assay plates, cartridges, multi-well assay plates, reaction vessels, etc.), processes for their preparation, and method of their use for conducting assays.
  • assay modules e.g., assay plates, cartridges, multi-well assay plates, reaction vessels, etc.
  • US 2002/0172621 A1 discloses a device comprising a plurality of microchambers having a closed vented environment, wherein each microchamber is in operative communication with a filling port and a vent aperture.
  • the device further comprises a base which is sandwiched between two liquid-impermeable membranes, with at least one of the membranes being gas permeable.
  • US 4,318,994 A1 discloses a card for use in an automated machine to detect the continued existence of microbes in a plurality of wells containing different media so that the organism can be speciated.
  • the card includes a configuration wherein the wells have different reduced oxygen environments and all of the wells have a bubble chamber connected to the well by a bifurcated passage.
  • Test cards their associated methods of use and manufacture, and corresponding molds for the manufacture of the test cards are described herein.
  • test card of the present invention is as described in claim 1 of the appended claims, and in the claims dependent on claim 1.
  • the present invention also provides a method of manufacturing a test card as described in claim 1 and its dependent claims, according to claim 10.
  • the test card may include a body comprising a first surface and a second surface opposite the first surface, and a well defining an opening extending from the first surface to the second surface and configured to receive a sample therein.
  • the well may include a shelf extending into the opening, such that the opening is narrower between the shelf and the second surface than between the shelf and the first surface.
  • the mold may include a first mold plate defining a first pin having a first shape corresponding to a portion of the well extending from the shelf to the first surface, and a second mold plate defining a second pin having a second shape corresponding to a portion of the well extending from the shelf to the second surface.
  • the first pin may be narrower than the second pin.
  • the first pin may be taller than the second pin.
  • a distal end of the first pin may be from 0.07 mm to 0.1 mm narrower than a distal end of the second pin.
  • sample test cards are filled by putting the Vitek ® card into a vacuum chamber. Both sides of the card are covered by the clear tape and a small straw or conduit is attached to the side of the card, a vacuum is then drawn and air is sucked out of the card through the straw which is in a test tube which contains the liquid sample. The vacuum is then released and the liquid is pushed into the wells thru the straw filling each well through channels which lead into each well in the card. The microorganisms in the samples may then be permitted to grow or reactions to proceed, generally over a period of up to a few hours, although the period varies with the type of bacteria or other substance analyzed and sample used. Each well contains dried chemicals that have been put in the card during a filling and drying process.
  • Example instruments for reading the test cards and an incubation carousel for holding the cards are further described in U.S. Pat. Nos. 5,762,873 ; 5,888,455 ; 5,965,090 ; 6,024,921 ; 6,086,824 ; 6,136,270 ; 6,156,565 ; and 7,601,300 .
  • Example test cards are further described, for example, in U.S. Pat. Nos. 5,609,828 ; 5,746,980 ; 5,869,005 ; 5,932,177 ; 5,951,952 ; USD 414,272 ; U.S. Pat. Publ. Nos. US2012/0141325A1 and US2012/0088263A1 .
  • Test cards may be used to hold a large number of samples for testing and analysis.
  • Dedicated machines may automate all or a portion of the sample preparation, incubation, and analysis within the test cards.
  • Traditional test cards may form bubbles in the wells when filled with the samples, which may degrade the resulting data. These bubbles may be caused by the chemical properties of the sample and the physical shape of the wells, which may combine to trap cavitated air inside the wells.
  • the sample test cards as described herein may have a generally rectangular shape and are in standard dimensions of from about 90 to about 95 mm in width, from about 55 to about 60 mm in height and from about 4 to about 5 mm in thickness. In one arrangement, the sample test cards of the present disclosure are about 90 mm wide, about 56 mm high and about 4 mm thick.
  • the test cards of described herein may comprise from 80 to 140 individual sample wells, or from about 96 to about 126 individual sample wells, each of which receives a test sample, for example a biological sample extracted from blood, other fluids, tissue or other material of a patient, for spectroscopic or other automated analysis.
  • the sample test cards may comprise 80, 88, 96, 104, 108, 112, 120, 126, 135 or 140 individual sample wells.
  • the sample test cards comprise 96 individual sample wells.
  • the sample test cards comprise 104 individual sample wells.
  • the sample test cards comprise 112 individual sample wells.
  • the sample wells are typically arranged in a series of horizontal rows and vertical columns and may comprise from about 8 to about 10 rows of from about 10 to about 16 columns of wells.
  • the sample wells may be present in various shapes and sizes.
  • the wells 204 may be circular. In some arrangements, the wells 204 may be substantially circular. In some arrangements, the wells 204 may be rectangular. In some arrangements, the wells 204 may be substantially rectangular. In some arrangements, the wells 204 may be rectangular with curved corners (e.g., at a 0.5 mm radius of curvature as shown in the arrangement of FIG. 7A ). In some arrangements, the wells 204 may be diamond shaped. In some arrangements, the wells 204 may be substantially diamond shaped. In some arrangements, the wells 204 may be oval shaped. In some arrangements, the wells 204 may be substantially oval shaped.
  • the wells 204 may define a long dimension and a short dimension within the plane of the first surface.
  • the long dimension is 2.550 mm and the short dimension is 1.750 mm.
  • the long dimension may be 1 mm, 1.25 mm, 1.5 mm, 1.75 mm, 2 mm, 2.25 mm, 2.5 mm, 2.75 mm, 3 mm, 3.25 mm, 3.5 mm, 3.75 mm, 4 mm, 4.25 mm, 4.5 mm, 4.75 mm, 5 mm, 5.25 mm, 5.5 mm, 5.75 mm, 6 mm, 6.25 mm, 6.5 mm, 6.75 mm, 7 mm, 7.25 mm, 7.5 mm, 7.75 mm, 8 mm, 8.25 mm, 8.5 mm, 8.75 mm, 9 mm, 9.25 mm, 9.5 mm, 9.75 mm, or 10 mm.
  • the short dimension may be 1 mm, 1.25 mm, 1.5 mm, 1.75 mm, 2 mm, 2.25 mm, 2.5 mm, 2.75 mm, 3 mm, 3.25 mm, 3.5 mm, 3.75 mm, 4 mm, 4.25 mm, 4.5 mm, 4.75 mm, 5 mm, 5.25 mm, 5.5 mm, 5.75 mm, 6 mm, 6.25 mm, 6.5 mm, 6.75 mm, 7 mm, 7.25 mm, 7.5 mm, 7.75 mm, 8 mm, 8.25 mm, 8.5 mm, 8.75 mm, 9 mm, 9.25 mm, 9.5 mm, 9.75 mm, or 10 mm.
  • the wells 204 may define a thickness extending between the first surface and the second surface.
  • the thickness is 3.2 mm.
  • the thickness may be 1 mm, 1.25 mm, 1.5 mm, 1.75 mm, 2 mm, 2.25 mm, 2.5 mm, 2.75 mm, 3 mm, 3.25 mm, 3.5 mm, 3.75 mm, 4 mm, 4.25 mm, 4.5 mm, 4.75 mm, 5 mm, 5.25 mm, 5.5 mm, 5.75 mm, 6 mm, 6.25 mm, 6.5 mm, 6.75 mm, 7 mm, 7.25 mm, 7.5 mm, 7.75 mm, 8 mm, 8.25 mm, 8.5 mm, 8.75 mm, 9 mm, 9.25 mm, 9.5 mm, 9.75 mm, or 10 mm.
  • the biological sample may be a direct sample from the patient, or be a patient sample which is extracted, diluted, suspended, or otherwise treated, in solution or otherwise.
  • the sample test cards of the present invention are generally used in a landscape orientation.
  • the test cards may be made of polystyrene, PET, or any other suitable plastic or other material.
  • the test cards may be tempered during manufacture with a softening material, so that crystalline rigidity, and resultant tendency to crack or chip, is reduced.
  • Test cards for instance may be manufactured out of a blend of polystyrene, approximately 90% or more, along with an additive of butyl rubber to render the card slightly more flexible and resistant to damage.
  • the test cards may also be doped with coloring agents, for instance titanium oxide to produce a white color, when desired.
  • test cards described herein may be of use in identifying and/or enumerating any number of microorganisms, such as bacterial and/or other biological agents.
  • Many bacteria lend themselves to automated spectroscopic, fluorescent and similar analysis after incubation, as is known in the art.
  • the transmission and absorption of light is affected by the turbidity, density and calorimetric properties of the sample. Fluorescent reactions may be performed as well, independently or along with spectroscopic or other measurements. If fluorescent data are gathered, use of a coloring agent in test cards may be preferred, since an opaque card reduces or eliminates the scattering of fluorescent emissions throughout the card, as can occur with a translucent material.
  • Other types of detection and analysis can be done on the test cards, including testing of susceptibility of microorganisms to antibiotics of different types, and at different concentrations, so that the test cards are general-purpose.
  • a front view of an arrangement of a test card 202 is shown having a plurality of sample wells 204.
  • the test card 202 has a first or front surface 206 and a second or rear surface (shown in FIGS. 5 , 7B, and 7C ), opposite said front surface 206, a first or leading side edge 210, a second or trailing side edge 212, a top edge 214, and a bottom edge 216.
  • the test card 202 may comprise 96 individual sample wells arranged in twelve columns of eight sample wells 204.
  • the distribution channel 230 comprises a relatively long channel, which weaves across the front surface 206 of the test card 202 among a plurality of columns of sample wells 204. As shown, the distribution channel 230 extends first horizontally across the top of a first column of sample wells 204 and then vertical down the front surface 206 of the test card 204 ( or descending) ( i.e ., descending branch 232) between parallel sets or columns of sample wells 204, each column comprising eight sample wells 204.
  • the distribution channel 230 comprises a traversing branch 234, which transverses in a horizontal manner across the surface of the card 202.
  • the distribution channel 230 then extends vertically up (or ascends) the front surface 206 of the test card 202 ( i.e ., ascending branch 233) between a second set of columns of sample wells 204.
  • the distribution channel 230 comprises a another traversing branch 234, which traverses in a horizontal manner across the surface of the card to the top of a third set of sample well columns and then extends vertically down or descends down ( i.e ., descending branch 232) between the columns of sample wells 204.
  • the first distribution channel 230 may comprises a fluid flow channel having a width of about 0.5 mm and a depth of about 0.5 mm ( i.e ., a cross section of approximately 0.25 mm).
  • Fill channels 236 may be relatively short channels (which may be kinked) that extend from the distribution channels 230 to the sample wells 204, and function to connect, and thereby fill the individual sample wells 204 of test card 202.
  • fill channels 236 may comprise a fluid flow channel having a width of about 0.2 to about 0.4 mm and a depth of about 0.3 to about 0.5 mm ( i.e ., a cross section of about 0.06 to 0.2 mm 2 .
  • the fill channels 234 have a width of about 0.3 mm and a depth of about 0.4 mm (i.e., a cross section of about 0.12 mm 2 ).
  • test card may include a bubble trap 250 and connected channel 252 to receive any bubbles that are prevented from sticking in the well by the shelf.
  • the test cards 202 of this design concept may also comprise a series of sensor stop holes 260, a barcode or other data marking (not shown), a tapered bezel edge 270, and/or lower and upper rails 280, 282, optionally with associated leading lip 284 or trailing truncation 286.
  • the depicted arrangement includes a shelf 300 extending into an opening 310 of the wells 204.
  • the opening 310 of the wells 204 may, and in the present invention do, extend from the first, front surface 206 to the second, rear surface 207 (shown in FIGS. 5 , 7B, and 7C ) of the card 202.
  • the opening 310 of the wells 204 may be, and in the present invention are, defined by a wall 320 extending from the first surface 206 to the second surface 207.
  • the wall 320 may, and in the present invention does, include a first portion 322 defined between the shelf 300 and the first surface 206, and a second portion 324 defined between the shelf 300 and the second surface 207 (shown in FIGS. 5 , 7B, and 7C ), such that the shelf 300 forms the junction between the first and second portions of the wall.
  • the test card 202 may include any form of supply conduit 290 and bubble trap 250.
  • a supply conduit (290) connects to the at least one well (204) at the wall (320) at a location between the shelf (300) and the first surface (206) such that the shelf (300) is formed at a portion of the wall (320) beneath the connection of the supply conduit.
  • the shelf 300 is formed only at a portion of the wall 320 beneath the supply conduit 290, with the remaining areas of the wall being substantially flat between the first portion 322 and second portion 324.
  • the shelf 300 may otherwise include the same properties, dimensions, and features of the shelves discussed herein.
  • the shelf 300 shown in FIG. 4 may include the same cross section shown in any of FIGS. 5 and 7B-7C , albeit only at the portion of the wall 320 beneath the supply conduit 290, with the first portion 322 of the wall above the shelf being wider than the second portion 324 below the shelf.
  • the opening 310 in a plane of the second portion 324 may be narrower than at a plane of the first portion 322 at all axial positions (e.g., along axis A shown in FIG. 5 ).
  • the depicted shelf 300 may include rounded edges that join with the wall 320 as shown.
  • the shelf 300 may be disposed only under the supply conduit 290 ( e.g ., directly in line with the supply conduit in the axial A direction).
  • the shelf 300 may include a constant width in portions directly under the supply conduit 290 and may curve or taper to flush with the wall 320 on either side of the supply conduit.
  • the shelf 300 may be disposed on one surface of the wall 320 of the well 204 (e.g., in arrangements having a rectangular or substantially rectangular shape, the shelf may be disposed on one of the four sides of the well).
  • the well 204 includes an opening 310 bounded by a wall 320 having a first portion 322 and a second portion 324 as described above.
  • the well 204 may, and in the present invention does, include a shelf 300 extending into the opening 310.
  • the shelf 300 may, and in the present invention does, define a shelf surface 330 that projects towards the center of the opening.
  • the shelf 300 may extend substantially laterally (e.g ., the shelf surface 330 may be defined in a plane perpendicular to a longitudinal axis A of the opening 310 and parallel to the first 206 or second 207 surfaces) to change the internal cross section of the well 204 when moving in the longitudinal direction A.
  • a vector normal to the shelf surface 330 may be oriented in the longitudinal direction A.
  • the shelf 300 may, and in the present invention does, cause the second portion 324 of the wall 320 to have a smaller cross-sectional area than the first portion 322 of the wall, when taken relative to a plane that is perpendicular to the longitudinal axis A (e.g ., a plane parallel to either the first 206 or second 207 surface).
  • the opening 310 is narrower in the portion 324 below the shelf 300 than the portion 322 above the shelf.
  • the narrower portion 324 may be positioned gravitationally downward of the wider portion 322 of the wall 320 and opening 310 to prevent bubbles from catching on the wall. In such arrangements, bubbles may be released from the well 204 and captured in the bubble trap 250 (shown in FIGS.
  • the wall 304 may substantially only decrease in cross-sectional area and/or diameter when moving downward ( e.g. , along the longitudinal axis A from the first surface 206 to the second surface 207). Maintaining an opening 310 that only widens when the bubbles are floating from proximate the second surface 207 towards the first surface 206 prevents any pinch points that would retain the bubbles within the well 204, and the shelf 300 described herein encourages and causes the bubbles to release.
  • the terms “substantially” or “approximately” indicate that the accompanying dimension need not be achieved with mathematical precision, but rather, that the specified dimension is accomplished to a standard margin of error within manufacturing tolerances and physical limits as would be appreciated by a person of ordinary skill in the art.
  • the edges of the wells may be called “approximately 90 degrees” despite limitations on molding and pressing technology requiring the edges to be slightly rounded.
  • the opening 310 may not substantially widen when travelling downward in the longitudinal direction A from the first surface 206 toward the second surface 207; however, this does not preclude the aforementioned rounded edges from curving inward slightly within manufacturing limits.
  • the shelf 300 may be positioned at any vertical location (e.g ., at any point along the longitudinal axis A) within the well 204. In some arrangements, the shelf 300 may be positioned below the midway point ( e.g ., closer to the second surface 207 than the first surface 206) of the well 204. In some further arrangements, the shelf 300 may be positioned at any increment along the longitudinal direction ( e.g ., 1/8, 1/4, 1/3, 3/8, 1/2, 5/8, 2/3, 3/4, 7/8, or any sub-increment thereof) of the well 204.
  • the shelf 300 may project into the opening 310 sufficiently to prevent bubbles from adhering to the wall 320.
  • the shelf 300 may extend at a radial width of 0.035 mm (0.0014 in) into the well 204 ( e.g ., dimension B, in a direction perpendicular to the longitudinal axis A).
  • the shelf may extend at a radial width of 0.035 mm (0.0014 in) or greater into the well 204 ( e.g ., dimension B, in a direction perpendicular to the longitudinal axis A).
  • the shelf 300 may extend at a radial width of 0.05 mm (0.0020 in) into the well 204 ( e.g ., dimension B, in a direction perpendicular to the longitudinal axis A). In some arrangements, the shelf 300 may extend at a radial width of 0.05 mm (0.0020 in) or greater into the well 204 ( e.g. , dimension B, in a direction perpendicular to the longitudinal axis A). In some arrangements, the shelf 300 may extend at a radial width of 0.05 mm (0.0020 in) or less into the well 204 ( e.g. , dimension B, in a direction perpendicular to the longitudinal axis A).
  • the shelf 300 may extend radially from 0.035 mm (0.0014 in) to 0.05 mm (0.0020 in) into the well 204 ( e.g ., dimension B, in a direction perpendicular to the longitudinal axis A).
  • the width of the opening 310 at the first portion 322 of the wall 320 may differ from the width of the opening at the second portion 324 of the wall by the combined widths of the shelf on either side of the well, as applicable.
  • the second portion 324 immediately below the shelf 300 is 0.07 mm (0.0028 in) narrower than the first portion 322 immediately above the shelf for every cross-sectional plane extending between the first surface and the second surface ( e.g ., every axis perpendicular to the longitudinal axis A).
  • the second portion 324 immediately below the shelf 300 is 0.1 mm (0.0040 in) narrower than the first portion 322 immediately above the shelf for every cross-sectional plane extending between the first surface and the second surface ( e.g ., every axis perpendicular to the longitudinal axis A).
  • the width of the opening 310 may differ by 0.07 to 0.1 mm above and below the shelf. The area may similarly be determined from the dimensions of the well detailed herein.
  • the width may only differ by 1X the radial widths detailed herein.
  • the extension of the shelf 300 may be measured as the difference in radius above and below the shelf 300 for a given angular position relative to the longitudinal axis A.
  • the wells 204 may be circular, and in some arrangements, the wells 204 may be non-circular ( e.g ., substantially rectangular or oval-shaped).
  • the shelf 300 may extend into the opening 310 uniformly about the circumferential direction ( e.g ., circumferentially around the longitudinal axis A), such that the difference in radius between the first portion 322 and second portion 324 of the wall 320 is constant. In some arrangements, the shelf 300 may not be uniform, and the radius between the first portion 322 and second portion 324 of the wall 320 may vary with angular position.
  • the shelf 300 may extend into the opening 310 only at select sections of the well 204. In the present invention the shelf 300 is positioned directly below the supply conduit 290. In some arrangements (not claimed), the shelf 300 may be positioned across the well 204 from the supply conduit 290. In such arrangements, the wall 310 may have a substantially constant radius in the longitudinal direction A elsewhere without any shelf. In some arrangements, the shelf 300 may extend circumferentially around the entire opening 310.
  • the mold plate 400 may include a first or second surface 406 corresponding to the first 206 or second 207 surface (shown in FIGS. 5 , 7B, and 7C ) ( e.g ., depending on which half of the mold is referenced).
  • the mold plate 400 may further include a plurality of pins 410 that are shaped as the inverse of a portion of the opening 310.
  • a second mold plate, representing the second surface is shown, and a top mold plate would include substantially the same pins, albeit with additional channeling as shown in FIGS. 1-5 and 7A-7E, having a different width.
  • two mold plates 400 may be, and in the present claims are, aligned surface 406 to surface 406 with the ends of the pins 410 abutting one another.
  • the pins 410 of the respective mold plates 400 may, and in the present invention do, differ in size to create the shelf 300 (shown in FIGS. 2-5 , and 7A-7E ).
  • the pins may differ by the exact shape of the desired shelf surface 330 dimensions, including each and every set of possible dimensions discussed above.
  • a first pin of a first mold plate may be the same 0.035 mm to 0.05 mm wider in radius than a second pin of a second mold plate.
  • the mold plates 400 are applied to the test card material, the shelf 300 is thereby formed at the parting line between mold halves, such that the shelf surface 330 is parallel to the ends of the pins of the mold plates.
  • the test cards 202 may be formed by injection molding between the two plates, by pressing a pliable material between the two plates, or by any other manufacturing technique.
  • the test card 202 is produced by aligning a first mold plate with a second mold plate.
  • the first mold plate includes a first pin having a first shape corresponding to a portion of the well 204 extending from the shelf 300 to the first surface 206.
  • the second mold plate includes a second pin having a second shape corresponding to a portion of the well extending from the shelf to the second surface.
  • the first pin may be narrower than the second pin, having the same dimensions between pins as the shelf 300 detailed above.
  • the method may include molding the test card 202 between the first mold plate and the second mold plates.
  • FIGS. 7A-7E show various views of a well according to some arrangements discussed herein.
  • the dimensions depicted in FIGS. 7A-7E are represented in millimeters and the angles in degrees, and FIGS. 7A-7E are drawn to scale.
  • FIG. 7A depicts a top plan view of the first surface of the card, showing a well 204 and bubble trap 250.
  • FIG. 7B shows a cross-sectional view of the well 204 of FIG. 7A taken on the D1 axis.
  • the shelf 300 is defined in the wall 320 of the well 204 with the first portion 322 extending to the first surface from the shelf and the second portion 324 extending to the second surface.
  • FIG. 7C shows a cross-sectional view of the well 204 of FIG. 7A taken on the D2 axis.
  • the first portion 322 of the wall 320 slopes outwardly relative to the direction beginning at the shelf 300 and ending at the first surface by approximately 3 degrees.
  • the first portion may slope by 1 degree, 2 degrees, 4 degrees, 5 degrees, 6 degrees, 7 degrees, 8 degrees, 9 degrees, 10 degrees, 11 degrees, 12 degrees, 13 degrees, 14 degrees, 15 degrees, 16 degrees, 17 degrees, 18 degrees, 19 degrees, 20 degrees, 21 degrees, 22 degrees, 23 degrees, 24 degrees, or 25 degrees.
  • the second portion 324 of the wall may have no slope, or may slope outwardly relative to the direction beginning at the shelf 300 and ending at the second surface by approximately 0.5 degrees.
  • the slope of the first portion 322 may help release bubbles.
  • the slope of the wall 320 may help release the card from the molds detailed herein.
  • the second portion 324 may remain narrower ( e.g ., the distance across the opening being narrower) than any portion of the first portion 322 at each longitudinal and radial position of the opening 310.
  • the second portion 324 may equal or become wider than the first portion 322 ( e.g ., the distance across the opening being equal or wider) as the second portion approaches the second surface.
  • the shelf 300 may protrude outwardly such that the opening 310 is wider at the first portion 322 immediately adjacent the shelf 300 than the second portion 344 immediately adjacent the shelf regardless of slope.
  • the card may be approximately 3.2 mm (0.126 inches) thick.
  • the shelf 300 may be disposed at a mid-point in the thickness ( e.g ., halfway between the first surface and the second surface). In the depicted arrangement, the shelf 300 is positioned 1 mm (0.039 inches) from the second surface and 2.2 mm (0.087 inches) from the first surface, being 31.25% of the thickness from the second surface. In some arrangements, the shelf 300 may be disposed one third of the thickness from the second surface and two thirds of the thickness from the first surface.
  • the shelf 300 may be positioned at any increment along the longitudinal direction (e.g ., 1/8, 1/4, 1/3, 3/8, 1/2, 5/8, 2/3, 3/4, 7/8, or any sub-increment thereof) of the well 204.
  • FIG. 7D a zoomed top view of the area D3 in FIG. 7A is shown.
  • the bubble trap 7D may include the depicted dimensions and orientation relative to the well 204 and channel 252.
  • FIG. 7E a cross-sectional view of the bubble trap 250 is shown taken along axis D4 in FIG. 7D .
  • the walls of the bubble trap 250 may slope outwardly relative to the direction oriented towards the first surface at, for example, 3 degrees.
  • the bubble trap 250 may terminate within the card and may stop short of the second surface.
  • the second portion 324 may equal or become wider than the first portion 322 ( e.g ., the distance across the opening being equal or wider) as the second portion approaches the second surface.
  • the shelf 300 may protrude outwardly such that the opening 310 is wider at the first portion 322 immediately adjacent the shelf 300 than the second portion 344 immediately adjacent the shelf regardless of slope.
  • the card may be approximately 3.2 mm (0.126 inches) thick.
  • the shelf 300 may be disposed at a mid-point in the thickness ( e.g ., halfway between the first surface and the second surface). In the depicted embodiment, the shelf 300 is positioned 1 mm (0.039 inches) from the second surface and 2.2 mm (0.087 inches) from the first surface, being 31.25% of the thickness from the second surface. In some embodiments, the shelf 300 may be disposed one third of the thickness from the second surface and two thirds of the thickness from the first surface.
  • the shelf 300 may be positioned at any increment along the longitudinal direction (e.g ., 1/8, 1/4, 1/3, 3/8, 1/2, 5/8, 2/3, 3/4, 7/8, or any sub-increment thereof) of the well 204.
  • FIG. 7D a zoomed top view of the area D3 in FIG. 7A is shown.
  • the bubble trap 7D may include the depicted dimensions and orientation relative to the well 204 and channel 252.
  • FIG. 7E a cross-sectional view of the bubble trap 250 is shown taken along axis D4 in FIG. 7D .
  • the walls of the bubble trap 250 may slope outwardly relative to the direction oriented towards the first surface at, for example, 3 degrees.
  • the bubble trap 250 may terminate within the card and may stop short of the second surface.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Hematology (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Claims (10)

  1. Eine Testkarte (202), die Folgendes beinhaltet:
    einen Körper mit einer ersten Oberfläche (206) und einer zweiten Oberfläche (207), die der ersten Oberfläche (206) gegenüberliegt;
    mindestens eine Vertiefung (204), die eine Öffnung (310) definiert, die sich von der ersten Oberfläche (206) zu der zweiten Oberfläche (207) erstreckt und so konfiguriert ist, dass sie eine Probe darin aufnimmt; wobei die mindestens eine Vertiefung (204) Folgendes beinhaltet:
    eine Wand (320), die die Öffnung (310) begrenzt und sich zwischen der ersten Oberfläche (206) und der zweiten Oberfläche (207) der Karte (202) erstreckt;
    wobei eine Versorgungsleitung (290) mit der mindestens einen Vertiefung (204) an der Wand (320) verbunden ist;
    wobei Dichtungsmembranen sowohl auf der ersten Oberfläche (206) als auch auf der zweiten Oberfläche (207) angeordnet sind, die die Öffnung (310) der mindestens einen Vertiefung (204) sowohl an der ersten Oberfläche (206) als auch an der zweiten Oberfläche (207) abdecken;
    dadurch gekennzeichnet, dass:
    die mindestens eine Vertiefung (204) ferner Folgendes beinhaltet:
    eine Ablage (300), die eine Ablageoberfläche (330) definiert, wobei sich ein erster Abschnitt (322) der Wand (320) von der Ablageoberfläche (330) zu der ersten Oberfläche (206) erstreckt und sich ein zweiter Abschnitt (324) der Wand (320) von der Ablageoberfläche (330) zu der zweiten Oberfläche (207) erstreckt, und
    wobei die Ablage (300) von der Wand an einer Kreuzungsfläche des ersten Abschnitts und des zweiten Abschnitts vorsteht, wobei die Öffnung (310) zwischen der Ablage (300) und der zweiten Oberfläche (207) schmaler ist als zwischen der Ablage (300) und der ersten Oberfläche (206), wobei die Ablageoberfläche (330) im Wesentlichen parallel zu der ersten Oberfläche (206) oder der zweiten Oberfläche (207) ist, und
    die Versorgungsleitung (290) mit der mindestens einen Vertiefung (204) an der Wand (320) an einer Stelle zwischen der Ablage (300) und der ersten Oberfläche (206) verbunden ist, sodass die Ablage (300) an einem Abschnitt der Wand (320) unterhalb der Verbindung der Versorgungsleitung (290) gebildet wird.
  2. Testkarte (202) gemäß Anspruch 1, wobei ein erster Abstand zwischen der Ablage (300) und der ersten Oberfläche (206) größer ist als der Abstand zwischen der Ablage (300) und der zweiten Oberfläche (207).
  3. Testkarte (202) gemäß Anspruch 1, wobei sich die Ablage (300) von 0,035 mm bis 0,05 mm in die Öffnung (310) erstreckt.
  4. Testkarte (202) gemäß Anspruch 1, wobei die Ablageoberfläche (330) eine radiale Breite von 0,035 mm bis 0,05 mm relativ zu einer Längsachse der mindestens einen Vertiefung (204) definiert.
  5. Testkarte (202) gemäß Anspruch 1, wobei eine Querschnittsfläche der Öffnung (310) innerhalb einer Ebene parallel zu der ersten Oberfläche (206) oder der zweiten Oberfläche (207) an allen axialen Positionen zwischen der Ablage (300) und der ersten Oberfläche (206) größer ist als zwischen der Ablage (300) und der zweiten Oberfläche (207).
  6. Testkarte (202) gemäß Anspruch 1, wobei sich die Ablage (300) umfänglich um die Öffnung (310) innerhalb der mindestens einen Vertiefung (204) erstreckt.
  7. Testkarte gemäß Anspruch 1, wobei die mindestens eine Vertiefung (204) eine Vielzahl von Vertiefungen beinhaltet, vorzugsweise 104 Vertiefungen.
  8. Testkarte (202) gemäß Anspruch 1, wobei die Dichtungsmembranen durchsichtig sind.
  9. Testkarte (202) gemäß Anspruch 1, wobei der Körper ferner Folgendes definiert:
    mindestens einen Verteilungskanal (230) in Fluidkommunikation mit der mindestens einen Versorgungsleitung (290); und
    mindestens einen Einlassport, wobei der mindestens eine Einlassport den mindestens einen Verteilungskanal (230) mit einem Äußeren der Testkarte (202) durch ein Einlassreservoir (222) fluidisch verbindet.
  10. Ein Verfahren zum Herstellen einer Testkarte (202) gemäß einem der Ansprüche 1-9, wobei das Verfahren Folgendes beinhaltet:
    Ausrichten einer ersten Formplatte mit einer zweiten Formplatte, wobei die erste Formplatte einen ersten Stift mit einer ersten Gestalt umfasst, die einem Abschnitt der mindestens einen Vertiefung (204) entspricht, der sich von der Ablage (300) zu der ersten Oberfläche (206) erstreckt, wobei die zweite Formplatte einen zweiten Stift mit einer zweiten Gestalt aufweist, die einem Abschnitt der mindestens einen Vertiefung (204) entspricht, der sich von der Ablage (300) zu der zweiten Oberfläche (207) erstreckt, und wobei der zweite Stift schmaler ist als der erste Stift;
    Formen der Testkarte zwischen der ersten Formplatte und der zweiten Formplatte,
    wobei die Ablage (300) an der Schnittfläche der ersten Formplatte und der zweiten Formplatte erzeugt wird; und
    Anordnen von Dichtungsmembranen sowohl auf der ersten Oberfläche (206) als auch auf der zweiten Oberfläche (207), die die Öffnung (310) der mindestens einen Vertiefung (204) an der ersten Oberfläche (206) und der zweiten Oberfläche (207) abdecken.
EP17882854.7A 2016-12-23 2017-12-22 Testkarte mit vertiefungsregal Active EP3559201B1 (de)

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US201662438531P 2016-12-23 2016-12-23
PCT/US2017/068230 WO2018119410A1 (en) 2016-12-23 2017-12-22 Test card with well shelf

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CN110730817A (zh) 2020-01-24
AU2017382375B2 (en) 2020-07-16
WO2018119410A1 (en) 2018-06-28
EP3559201A4 (de) 2021-02-24
US10987668B2 (en) 2021-04-27
BR112019012579B1 (pt) 2023-01-24
BR112019012579A2 (pt) 2019-11-19
US20180178214A1 (en) 2018-06-28
EP3559201A1 (de) 2019-10-30
AU2017382375A1 (en) 2019-08-01
CN110730817B (zh) 2023-08-01
CA3048010A1 (en) 2018-06-28

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